LazarusTaxa
SILVER Star
I'm fed up.. I've tried painting metal parts countless times and have never been able to get it to stick. I've tried Rustoleum, duplicolor, etc. I've tried etch primers. It seems like I've tried everything and every time it seems like I'm left with a coat of paint that doesn't stick well and can be scratched super easily by metal (or sometimes even a fingernail)... Nothing like the factory paint I'm redoing.
Take for example this last batch I tried: These started as yellow zinc coated but were pretty rusty. I soaked them in a phosphoric acid solution and brushed all the rust off till they were bright bare metal. I then scrubbed any residues from the acid with a green scotchbrite and wire brush. I then washed them thoroughly with dish soap and THEN wiped them down with acetone till the rag was clean. The whole time I'm wearing rubber gloves so my skin's oils don't get on the parts. This last time I then painted them with POR15 topcoat, which says on the can that it's fine on bare metal. I let them dry three days, and when installing them, the new bolt heads pull the paint right off under them... Rubbing that area with my finger, even more flakes off.
WHAT GIVES????????????? WHAT AM I DOING WRONG?????? I see everyone else say "shoot it with rustoleum" like it's some simple task.
The only paint I've ever gotten to stick to bare metal is regular POR 15 and that's after the full marine clean and metal prep run around (basically what I did above).
Take for example this last batch I tried: These started as yellow zinc coated but were pretty rusty. I soaked them in a phosphoric acid solution and brushed all the rust off till they were bright bare metal. I then scrubbed any residues from the acid with a green scotchbrite and wire brush. I then washed them thoroughly with dish soap and THEN wiped them down with acetone till the rag was clean. The whole time I'm wearing rubber gloves so my skin's oils don't get on the parts. This last time I then painted them with POR15 topcoat, which says on the can that it's fine on bare metal. I let them dry three days, and when installing them, the new bolt heads pull the paint right off under them... Rubbing that area with my finger, even more flakes off.
WHAT GIVES????????????? WHAT AM I DOING WRONG?????? I see everyone else say "shoot it with rustoleum" like it's some simple task.
The only paint I've ever gotten to stick to bare metal is regular POR 15 and that's after the full marine clean and metal prep run around (basically what I did above).